Q: Is 400,355 a Prime Number?
A: No, 400,355 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 400355 can be evenly divided by 1 5 80,071 and 400,355, with no remainder.
Since 400,355 cannot be divided by just 1 and 400,355, it is not a prime number.